CN1233140C - Method for providing multipoint connecting for user of radio communication network - Google Patents
Method for providing multipoint connecting for user of radio communication network Download PDFInfo
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- CN1233140C CN1233140C CNB011175788A CN01117578A CN1233140C CN 1233140 C CN1233140 C CN 1233140C CN B011175788 A CNB011175788 A CN B011175788A CN 01117578 A CN01117578 A CN 01117578A CN 1233140 C CN1233140 C CN 1233140C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/22—Interfaces between hierarchically similar devices between access point controllers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
- H04W40/26—Connectivity information management, e.g. connectivity discovery or connectivity update for hybrid routing by combining proactive and reactive routing
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Abstract
A method for allowing a mobile of a wireless communication simultaneous access to multiple data networks coupled to the wireless communication network. A network interface is created between network controlling elements, such as Base Station Controllers, of the wireless communication network. The network interface allows various communication channels established by the mobile to be routed to network controlling elements that are coupled to the various data networks. Information from various established communication channels are routed between various network controlling elements. Thus, a mobile is able to communicate simultaneously with different data networks. The network interface also allows handoffs to be executed with virtually no interruptions and no loss of information being exchanged between the mobile and system equipment involved in the handoff.
Description
Technical field
The invention provides a kind of user who is used for to cordless communication network provides multiple spot to connect, and need not to increase the method for network or user's mobile radio station hardware.
Background technology
Cordless communication network has been provided by the known technology that the multiple multi-user of providing inserts these networks.These technology comprise code division multiple access (CDMA), time division multiple access (TDMA) and frequency division multiple access (FDMA).And the various combinations of these technology (and other multiple access techniques) also are used to provide the access for the user.Along with these networks use and the increase of popularization, the type that offers user's service and resource is also along with change, and increased complexity.These resources are meant the system equipment (for example, radio transmitter, radio receiver, treatment facility) that is had and runed by the service provider.The various abilities that provided by system equipment also are provided these resources, and such as the bandwidth of distributing to the specific user, the user is allowed to send the power of its signal of communication, and perhaps the user is allowed to receive and send the speed of information.Service is meant that any one user uses the ability of resource in many ways.Normally, cordless communication network allow the user to communicate with one another through voice channel or with other network service.That is to say that the main type of communication is between the user or the voice communication between user and other networks.
Yet along with the development of the Internet and other data networks, cordless communication network not only provides voice service, but also data, services must be provided.Data are normally with the form of digital information, other signals that these digital informations are represented the signal of communication of text, figure, video and comprised voice.Set up variety of protocol already Data Receiving and transmission on the cordless communication network were provided.Every kind of agreement is one group and is used to the rule of stipulating how the communication between the user is activated, keeps and stops.Agreement is also stipulated communication mode between user and the system equipment and the communication mode between user and other network.The signal of communication user who comes from system equipment realizes each a little steps.These signals of communication are commonly referred to as system information or signaling information.Various protocols has been created as the standard of observing for by the communication network of world's various piece.
With reference to Fig. 1, Fig. 1 shows general wireless communication network infrastructure, and this facility is observed the standard of the specific CDMA data network be used to be called CDMA 2000 networks.User by wireless laptops 148 expressions just moves in network.User and/or its equipment (being subscriber equipment) are called as mobile node (MN) hereinafter.MN generally is by the user of communication network all and operation.For example, MN can be a cell phone, and wireless laptops PC or wireless personal digital assistant (PDA).MN generally inserts this network through the interface between MN and the network connection point.Network connection point is the system equipment of directly communicating by letter with MN, and is convenient to MN access communications network.Insert a network and comprise that confirmation MN is authorized to use the resource of communication network, and, allow MN to use available resource according to this confirmation.Air interface has defined will be at the signaling information of (through the communication channel between MN and the BTS) exchange between MN and the BTS, and will be assigned to MN so that MN inserts the resource of this network.
In Fig. 1, network connection point is one or one group of BTS (for example BTS 120,122,124,126,128,130,132 and 134), and BTS comprises a plurality of radio transmitter and receivers that are used to transmit and receive MN and system communication signal.Each specific sub-district of BTS service, each sub-district is symbolically represented by a hexagon.For example, sub-district 114 is by BTS 134 services.Each sub-district has been described that MN can receive and/or has been sent the rational border, ground of signal of communication to BTS.In multiple network, all networks as shown in Figure 1, the sub-district is divided into a plurality of fans, thus a specifically rational zone of being served by the specific resources of BTS is represented in each sector.For the ease of signal, each sub-district is divided into six sectors.Can be understood that at an easy rate that the number of sectors in sub-district depends on the specific resources that is comprised among the BTS that serves this sub-district, thereby sub-district can be divided into the sector about six.
Each BTS is coupled to base station controller (BSC) through a network communication link.BSC can be coupled to more than one BTS.For example, BSC 138 is coupled to BTS 120,122, and 124 and 126.BSC is the example of network control unit, and BSC manages the network connection point (for example BTS) that they are coupled to as system equipment.That is to say that how and when some signal of communication of BSC regulation will be sent out and/or be received by BTS or one group of BTS.Thereby, BSC service and control MN.For example, BSC sends the power level of its signal of communication to MN to BTS indication BTS.According to the standard of observing by this communication network, carry out the information exchange between BSC and the BTS.BSC is coupled to each other through the communication link (not shown).Each BSC also is coupled to packet data serving node (PDSN), and this PSDN is as cordless communication network with such as the gateway between the data network (not shown) of the Internet.That is to say that this data network is coupled to cordless communication network through PDSN.PDSN serves the specifically rational zone that the sub-district was positioned at of corresponding BTS.With reference to Fig. 1, PDSN 1 (being system equipment 146) serves a specific region that is illustrated by the broken lines.Similarly, PDSN 2 and PDSN 3 have their service area.PDSN is a kind of data, services entity, and it is not only as the gateway for the data network that is coupled, and the user of permission cordless communication network uses the utilized service of institute's coupling data networks.
Use for some, MN need use lasting IP address in being coupled to the data network of PDSN.The IP address is a concrete mark of specifically discerning MN, and just is being that with that data network this MN exchange message is irrelevant.Lasting IP address means along with user ground moves and be connected to new PDSN reasoningly, data network is with the grouping of routing user, keep same subscriber address simultaneously for current PDSN, even the user is not in such data network zone, promptly this network will be usually can route provides such grouping of grouping address.A protocol instance that allows this service is Mobile Internet Protocol (IP) [request explanation 2000].MN calls mobile IP process by registration PDSN as the initialized part of PDSN.The initialization of PDSN is that MN obtains the upward needed one group of process of service of PDSN.Mobile IP has the data network mobility (promptly being sent to another data network position from a data network site) of two kinds of forms, a kind of form is that PDSN participates directly in the data network mobility functions, and another kind of form is that mobile radio station self is carried out data network mobility function.Also also have the data network of other types to move Routing Protocol, such as general packet radio service (GPRS) and Cellular Digital Packet Data (CDPD).All these agreements route information to PDSN, and PDSN then can send this information to MN.
Some or all BSC also may be coupled to mobile switching centre (MSC) (not shown), and MSC provides and inserts public switched telephone network (PSTN).Scope that comprises a plurality of BTS of each MSC general management.Thereby every group of BTS controlled by a BSC, and this BSC is coupled to provide and inserts data network one or more PDSN of Russia.Although Fig. 1 shows the one-one relationship of BSC and PDSN, in many cases, the service provider will have such architecture, and promptly a plurality of BSC are connected to a plurality of PDSN, so that occurring providing load balancing or fault-tolerance when PDSN breaks down.
Receive by a plurality of BTS that are coupled to same BSC by the information that MN transmitted.Thereby it is all identical by the information that each BTS received.Each BTS is sent to same BSC with its information that receives, and this BSC turns to this information format the code character that is called as octet stream.Octet stream then is sent to the PDSN that is coupled to BSC, and PSDN is sent to the data network that is coupled with this eight bit byte.In brief, MN is linked into the data network that is coupled with a plurality of BTS through BSC and PDSN.
The cordless communication network of all networks as shown in Figure 1 is subjected to such restriction, promptly for specific MN, once only allows an access point to data network.Because ever-increasing access for data network requires (as mentioned above), the frequent hope of user inserts a plurality of different networks simultaneously, these networks can be private data networks, and public data network (for example the Internet) is perhaps such as the speech network of PSTN.And it is often very responsive for the interruption in the service that the information that MN transmitted and received inserts data network, and these services are to be caused by the performed switching of cordless communication network.Interrupt often is because the information dropout that takes place in switching.The information of particular type--such as the information relevant-especially responsive for the information dropout that takes place in switching with multimedia application.
Switching is a kind of known process, and by this process, the mobile MN that is served by particular B TS is located practically, thereby BTS can not provide enough service quality to this MN.BSC in some point control serving BTS can fully provide under the control of this BTS that moves the required service of MN in another group, will determine to transmit (promptly switching) its service and for the relevant control of MN to another BSC.Because this switching is between BSC, so this switching often is called as direct-cut operation.And in Fig. 1, if MN (for example kneetop computer 148) moves to the one group of BTS that is controlled by BSC 2 (136) from the BTS that is controlled by BSC 1 (144), also needing a switching (being the switching between PDSN 1 (146) and the PDSN 2 (136)) between the corresponding PDSN.Download, if the lasting address that MN PDSN 2 need be identical with the address of MN on PDSN 1, then MN must utilize aforesaid data network such as mobile IP to move Routing Protocol, registers to PDSN 2.The user may need identical address so that can not interrupt current communication stream, perhaps so as the user can through in the data network Anywhere known and static address and arrive.As the part of this process, mobile radio station must be through consulting and to this network authentication oneself (confirming that its mandate is to use this network), rebulids and the communicating by letter of PDSN 2.PDSN can contact other network equipments, with authentication and the mandate of finishing MN, and can call security protocol, with the communication of protection MN.As mentioned above, PDSN can participate in data network directly and move Routing Protocol, perhaps can only be the media between network and the mobile radio station.
MN can switch to another BTS many times from a BTS at session, and this depends on position and the speed of MN with respect to network B TS.Dialogue is the MN access network, is participated in communicating by letter and stopping the time quantum that specific communications experiences by the resource that this network provided by utilizing.Usually as the selection and the allocation units (SDU) of a BSC part, before switching, select to be used to serve the BTS of mobile MN.SDU general according to by or the information rate of selecting MN communication signal transmission power level that BTS receives and MN to transmit information, select BTS.Between transfer period, control BSC is sent to new BSC with signaling information and other data relevant with handoff protocol, local this MN of service so that new BSC can control its BTS.
During transfer of data,, thereby cause that the information that is transmitted and received by MN will be lost for the service cup middle-end of mobile MN.The interruption that causes information dropout has two kinds.A kind of interruption occur in wireless device among the MN reconfigure it self when receiving the radio signal of the BTS that makes a fresh start.Although the wireless device in this mobile radio station reconfigures its radio reception, it can't receive information.Since wireless device to reconfigure caused interruption shorter relatively, and generally on the order of magnitude of part second.The another kind of interruption is the information dropout that takes place when the PDSN that MN registers and initialization is new.As mentioned above, registration and the new PDSN (for example PDSN 2) of initialization are comprising the mobile route in variety of protocol process and the data network, and these processes are such as data link initialization, authentication, mandate and charging, security procedure.Although the 2nd PDSN (for example PDSN 2) carries out these functions, information is routed to previous PDSN (for example PDSN 1).Second kind of interruption is longer, and is the main cause that mobile station information is lost.Since carry out the data chain path level initialization, mobile IP, AAA, and the caused retardation of safety function can be several seconds.
It should be noted that switching can be started by MN, thereby this MN is configured for the signal quality that monitors automatic network, and when decision guarantees a switching.In this case, MN notifies this network for the requirement of switching, and then this network is carried out and switched, as mentioned above.
It is MN process data, services entity (for example PDSN) that multiple spot connects, and inserts a plurality of abilities that are coupled to the network (for example data network) of wireless network simultaneously, and it need increase additional hardware and software on MN.The example of additional firmware is that transmitter, receiver, modulator and other generally are used for the circuit of process communication signals.These additional resources will not only allow multiple spot to connect, and will eliminate because the interruption that switching causes (and data lose) significantly
In these cases, network can lost MN relatively less when a BTS switches another BTS or obliterated data not.That is to say that MN will set up the dialogue first time with first group of BTS in advance, these BTS are by the BSC control of being coupled to a PDSN.In mobile radio station and first group of BTS communication period, this mobile station monitors is from the signal of other groups BTS.When mobile radio station or network measuring have been reduced to such degree to the quality from the radio signal of first group of BTS, promptly further degrade and to cause unsafty communication quality, perhaps in addition the dialogue lose, mobile radio station then will be set up the second time and identical dialogue with second group of BTS under the control of the 2nd BSC that is coupled to the 2nd PDSN.Each dialogue all is by not on the same group hardware (for example, radio transmitter and receiver) control among the MN.Set up data, services on the 2nd PDSN after ,-first group of BTS that go offline go offline thereby MN will make dialogue for the first time.Because mobile radio station is carried out this " break-make " handover process, so mobile radio station will stand relatively little loss of communications or not loss.
Current, for cdma network, MN can start a plurality of while examples of radio link protocol (RLP).RLP is how Control Network provides an agreement from multiple resource a to MN, and wherein these resources are that BTS by the particular group of particular B SC control provides.When setting up dialogue between MN and network, each example of RLP is compared to a communication channel, and it is to be controlled and set up by the data in the origination message of MN that is stored in network or BSC transmission.Origination message also comprises indication in the information of session by the COS that network provided.Thereby MN can send and/or receive type I information by the example of RLP, and sends and/or receive second category information by another example of RLP.Because each example of RLP all is by same group of BTS route--thereby be that identical BSC can not insert different networks simultaneously with PDSN-MN.As previously mentioned, be combined into an octet stream from the information of the different instances of RLP, and be sent to a PDSN.This octet stream is divided into the frame of a plurality of 20ms, and these frames are sent and received by MN and control BSC.The amount of information that is contained in the frame depends on the speed that this information transmits between MN and purpose network.In order to utilize the additional firmware among the MN to realize that with software multiple spot is connected, will need redesign and make wireless user and system equipment.This method need be made substantial change current in the employed standard by wireless network.The more important thing is that the cost that increases new hardware in user and system equipment may be that user and provider of system are unwilling to accept very much.
Thereby, need a kind of user to provide multiple spot to connect, and need not in user and system equipment, to increase the method for new hardware, thereby this method can realize in the communication standard that communication network is observed to cordless communication network.In communication network shown in Figure 1, the MN of this network will need to have simultaneously a plurality of RLP examples, and wherein every kind of example is relevant with different network control units (being different BSC).
Summary of the invention
Method of the present invention provides the network interface between the network control unit of cordless communication network, when network interface allows information of same in the data, services exchanged between entities of MN and a plurality of communication networks, thereby provide multiple spot to connect.In general, network control element is coupled to the data, services entity of network, and is coupled to network connection point.Network control unit also through the system communication link couples controlled by network interface to other network control units.Network interface has defined information and how to have exchanged between network control unit.Especially, network interface has defined the signaling information that will exchange between network control unit, and information (user and/or system information) is as route between network control unit.Network interface is observed by the employed standard of cordless communication network.Thereby network interface becomes the part of the standard of being observed by cordless communication network, and in conjunction with in this standard.
The interface network of the inventive method is by MN, and network control unit or data, services entity are set up.The foundation that realizes by MN be by MN according to the standard of observing by communication network, insert by a network connection point that this communication network starts.Master network control unit (promptly being coupled to the network control unit of the network connection point that is inserted) is to a plurality of communication channels of MN assignment.When obtaining to insert this communication network, MN is to network connection point transmission origination message or by the defined message of this standard.This message is received by network connection point, and sends to the master network control unit.In a single day the master network control unit receives this message, just sets up the network interface of the inventive method.That is to say, this message comprises the data that will be assigned on a plurality of communication channels of MN, discern each this communication channel uniquely, each this channel is relevant with MN, and discern the particular network control unit that the information on the specific communication channel is routed to.So the master network control unit is routed to the suitable network control unit with the information relevant with specific communication channel.
Thereby, at the network connection point of information from being inserted of MN and each data, services exchanged between entities,, be routed to other network control units by master network control unit and the network interface set up.The information that network control unit (comprising the master network control unit) then receives them is routed to the data, services entity of their correspondences.
The network interface of the inventive method can be set up by system equipment.In this case, the data, services entity is set up network interface by sending a message (for example origination message) to its network control unit.Network control unit also can be set up a network interface by generating the data that will the communication channel relevant with specific MN be routed to other network control entities.After setting up network interface, according to the order of the network interface of being set up, the information that route is received from data network (through the data, services entity) by network control unit.Thereby the network interface of the inventive method is connected when allowing MN to have different pieces of information service entities with communication network, thereby the multiple spot connection for heterogeneous networks is provided.
In the preferred embodiment of the inventive method, network interface allows MN to insert the heterogeneous networks tie point of being controlled by the heterogeneous networks control unit simultaneously, switching to another network connection point from a network connection point, thereby the data that exchange between MN and corresponding data service entities have only few relatively loss or not loss.MN at first inserts this wireless network by first network connection point, and wherein this first network connection point is coupled to the first data, services entity via first network control unit.
When obtaining to insert this communication network, MN sets up a group communication channel (according to standard), and by these channels, information via first network control unit exchanges between the MN and the first data, services body.When the service quality that offers MN can guarantee to switch, MN (perhaps first network control unit, the perhaps first data, services entity) started the switching with second network control unit.First network control unit will be set up one and allow the network interface that it will the information relevant with MN be routed to second network control unit.MN will set up the first group communication channel between it and second network connection point, and will set up a network interface in second network control unit.Information that second network control unit will receive, that come and go from MN is sent to first network control unit.The zone network control unit will be sent to second network control unit from the information (through network interface) that first data entity comes and goes.Thereby the MN maintenance is communicated by letter with ground data, services entity, even it communicates by the communication channel via second network connection point and second network control unit.MN will set up the second group communication channel (according to a standard) with second network connection point now, and wherein this second network connection point is relevant with second network control unit.Second network control unit links to each other second group of channel with second network service entity, this second network service entity is coupled to second network control unit.Second network control unit links to each other the information of MN with the second group of channel that is coupled to second network service entity.MN will begin the registration and the initialize process of second data entity.These registration process will make data network that the information of MN is routed to the second data, services entity.The example of these initialization and registration process is a mobile IP protocol.
When MN according to handover process, when setting up the second group communication channel of data, services entity with ground through second network connection point and second network control unit, according to the order of the network interface of the inventive method, be routed to second network control unit (perhaps in contrast) from first network control unit in the information of the MN and the first data, services exchanged between entities.Thereby, before finishing switching, MN can with the earth's core second data, services entity exchange message.At the registration and the initialize process that finish with the second data, services entity, MN stops the first group communication channel between its own and second network control unit.Second network control unit then discharges and being connected of first network control unit.Information exchange between the MN and the second data, services entity realizes through second network control unit.The execution of switching only can be lost few relatively data or obliterated data not.
Description of drawings
Fig. 1 has described the architecture of general cordless communication network;
Fig. 2 shows method of the present invention.
Embodiment
The invention provides the network interface between the network control unit of communication network, thereby allow to be routed to a plurality of data, services of a plurality of network control units and communication network by a plurality of channel transmission informations between MN and the network connection point.The data, services entity generally is connected to other communication networks, thereby network interface can be realized the multiple spot connection between MN and each other communication networks.
The network interface of the inventive method based on and observe the control information how standard and the agreement of exchange message between the network control unit of communication network.For example, for some asynchronous transfer mode (ATM) network, the network interface of the inventive method will based on observe Q.2931 signaling control protocol.The example of another network interface application is the hereditary routed encapsulation (GRE) of information block, and wherein this GRE is controlled by A 10 and A 11 interfaces that the inter-operability specification that is used for CDMA 2000 access network edition 4s (IOS) is developed.Another example that can use this network interface is Internet protocol (IP), and this agreement is observed the signaling protocol and the form of regulation in simple computers telephone protocol (SCTP).
The network interface of the inventive method does not depend on the communication network of any communication protocol or any kind.And the network interface of the inventive method does not depend on any particular network architecture.Network interface can be identified in each in a plurality of communication channels of setting up between MN and the tie point, and each this channel is relevant with particular network control unit and data, services entity.Network interface allows network control unit that its proper data service entities of route is arrived in the communication of specific foundation.Thereby MN can insert a plurality of networks simultaneously.
Referring now to Fig. 2, Fig. 2 shows method of the present invention.In step 202, between MN and master network control unit, set up a plurality of communication channels.The master network control unit is the network control unit that is coupled to the network connection point that is inserted by this MN.At first, MN is according to the standard of being observed by this network, by coming the access communications network with the network connection point exchange signalling information.This standard also indicates MN how to set up a plurality of communication channels, and information will exchange between MN and master network control unit via network connection point by these channels.The foundation of communication channel relates to the distribution of resource, promptly allows the signal of communication relevant with specific MN to be sent out and to receive.The access communications network relates to the practical efficiency of institute's Resources allocation, with via a network connection point in MN and network control unit exchange message.According to the standard that communication network is observed, the signaling information that network connection point receives MN is sent to the master network control unit that is coupled with network connection point.
In step 204, the network interface of the inventive method is established in the master network control unit.Is system information (for example raw information) by the master network control unit from the received partial information of network connection point, and this system information is used to set up the network interface of the inventive method.When setting up the network interface of the inventive method, system information is discerned the communication channel by MN set up.Therefore, each this channel is relevant with this MN.And this system information channel that each is specific is relevant with at least one particular network control unit, and indicates each such channel should be sent to corresponding data, services entity.
In step 206, the master network control unit will be routed to suitable network control unit from each information of having set up communication channel, and this network control unit is coupled to communication network (for example data network) via the data, services entity.The route of communication channel is set up based on the signaling information that receives.According to making a start of signaling information, the route of communication channel can be caused by network control unit or MN or data, services entity.It should be understood that by communication channel and transmit the route that routing iinformation is also referred to as communication channel.Information is via system communication link (not shown) route between system control unit.Thereby MN inserts a plurality of communication networks simultaneously.It should be noted that the system information that is used to set up network interface can come from this MN or come from another network control unit.In other words, network interface or by system equipment (for example, network control unit, data, services entity), perhaps by subscriber equipment or the two foundation.
Connect to be used for carrying out by the multiple spot that network interface provided of the inventive method and switch, and only need quite little or do not have data degradation.Network interface of the present invention allows to insert simultaneously the MN of the heterogeneous networks tie point of being controlled by heterogeneous networks unit (being coupled to the different pieces of information service entities), switch to another network connection point from a network connection point, and in fact between the data, services entity of MN and correspondence, do not have the exchanges data loss.MN is first Network Access Point by being coupled with first network control unit at first, is linked into this wireless network.
When obtaining the access communications network, MN sets up a group communication channel (according to standard), and by these channels, information exchanges between the MN and first data entity via first tie point and first network control unit.First tie point is coupled to first network control unit, and this network first control unit is the master network control unit.When the service quality that offers MN can guarantee to switch, MN (perhaps first network control unit) started the switching with second network connection point and second network control unit.Switching also can be by first network control unit or the data, services entity startup that is coupled with first network control unit.
Start a switching according to the standard of observing by cordless communication network.As the part of handover process, MN is via second Network Access Point for the indication of first network control unit, is linked into second network control unit.Second network control unit is coupled to the second data, services entity.When being linked into second network control unit via second Network Access Point, MN is via second network connection point, sets up the communication channel between it and second network control unit.First network control unit is also set up a network interface in its position and on second network control unit--according to method of the present invention.It should be noted that network interface also can be set up by second network control unit or the second data, services entity.Second network control unit thereby be a master network control unit.
MN is now via second network connection point and second network control unit, sets up the second group communication channel between it and the second data, services entity.Although MN is setting up the second group communication channel, information, still exchanges between the MN and first data entity via second network connection point, second network control unit and first network control unit by the first group communication channel.In other words, network interface (on second network control unit) allows the first group communication channel to be routed to first network control unit from second network control unit, and be routed to the first data, services body at last, the second group communication channel is established simultaneously; This information in the MN and the first data, services exchanged between entities that makes will be routed to the first data, services body from second network control unit, perhaps in contrast.The second group communication channel is established, with permission information via second network connection point and second network control unit, in the MN and the second data, services exchanged between entities.
The second group communication channel between the MN and the second data, services entity is established, and MN initialization and need register to the second data, services entity time, MN stops the first group communication channel.Second network control unit no longer with the first group communication channel via first network control unit, be routed to the first data, services entity.The first group communication channel is removed, and the information relevant with this MN route between the first and second network control entities no longer.MN communicates by letter with the second data network controlled entity now via the second group communication channel, and this second group communication channel extends to second network control unit from MN through second network connection point.Switching is carried out with the form of " break-make " process, this means only between the MN and the second data, services entity, set up new communication channel after, the information exchange between the MN and the first data, services entity just is terminated.Thereby the execution of switching only needs quite little or does not have data degradation.
For the ease of explaining that network interface of the present invention is applied in the switch application of communication network shown in Figure 1.Network connection point is one group of BTS or one of them BTS that is served by network control unit.Network control unit is BCS.The data, services entity is PDSN.Kneetop computer 148 expression MN.Kneetop computer 148 is illustrated as MN from being shifted out by BSC 1 (unit 144) and BTS132 and 134 zones of being served.The direction that shifts out is illustrated as arrow 150.Kneetop computer 148 is according to the standard of being observed by this network, the access communications network, and set up the example (for example a plurality of communication channel) of a plurality of RLP.Specifically, kneetop computer 148 and BTS 130,134 and 132 exchange messages, these BTS are coupled to BSC 1 (unit 144); The information that BSC 1 receives from BTS 130,132 and 134, and according to the standard of being observed, to kneetop computer 148 Resources allocation.The information that is received by BSC 1 is formatted as octet stream, and is sent to PDSN 1 (unit 146) with the form of 20ms frame.The grouping that is used for mobile radio station from data network is routed to PDSN 1.PDSN 1 is sent to the first network (not shown) that is coupled with PDSN 1 with information, wherein kneetop computer 148 with this first network service.First network for example can be a data network.
When kneetop computer 148 leaves BSC 1 and shifts to BSC 2 (unit 138), the quality of signal of communication may be such, it is kneetop computer 148 and no longer possible or very difficult with the abundant communication between the relevant BTS of BSC 1 (being BSC130,132 and 134).Communication quality is provided by provider of system usually, and generally with directly related by the power level such as the signal of communication that MN received of kneetop computer 148.BSC 1 detects the variation in the signal quality, and starts the switching between it and the BSC 2.That is to say that BSC1 wishes MN is switched to BSC 2, to allow MN and PDSN 2 exchange messages.It should be noted, switch also and can start by kneetop computer 148 or PDSN 1.According to standard, BSC 1 indicates kneetop computer 148 to be connected to BSC 2 by to sending suitable message with BSC 2 to the BTS of coupling.The information that BTS 126 receives from kneetop computer 148, and transfer them to BSC 2.
Network interface is established in BSC 1 and BSC 2.That is to say that the foundation of network interface relates to some example of discerning RLP, and indicate these examples that identify where to be routed to (being which BSC).Kneetop computer 148 transmits the origination message of one of them RLP example of having set up, thereby this origination message identifies the example of RLP, and indicates this example will be routed to second data network.The information relevant with the example that identifies is routed to BSC 2 from BSC 1, and is routed to PDSN 1.Kneetop computer 148 is communicated by letter with PDSN 1 by first group of RLP example now, and this first group of RLP example is routed on BSC1 and the PDSN 1 from BSC 2L.Thereby kneetop computer 148 can insert and communicate by letter with PDSN 1.
Kneetop computer 148 is set up second group of RLP example with BSC 2.Utilization is set up these RLP example, i.e. PDSN2 for the request that is connected to the PDSN that is coupled with BSC 2.After BSC 2 was connected to PDSN 2 with kneetop computer 148, kneetop computer 148 was by the data link layer of initialization such as PPP, and carried out mobile IP registration, utilized PDSN2 initialization self.PDSN 2 will utilize other entities in the data network, come authentication, authorize this mobile radio station.PDSN 2 also can set up fail safe by data network, with the communication of protection mobile radio station.PDSN 2 will carry out mobile IP registration process according to mobile IP standard.That is to say that PDSN may directly relate to mobile IP registration, perhaps only mobile IP registration is sent to pellucidly other entities in the data network.
Kneetop computer 148 is communicated by letter with PDSN 1 by first group of RLP example (these RLP examples are routed to BSC 1 and PDSN 1 from BSC2), and utilize second group of RLP example now, is used for communicating by letter with PDSN 2.First and second groups of RLP examples use the BTS 126 that is coupled with BSC 2.When second group of example of RLP is established, and when finishing the registration of switching with PDSN 2 and initialize process, first group of example is removed, and the information relevant with kneetop computer 148 no longer is routed to BSC 2 from BSC 1.Kneetop computer 148 is now via the second group of RLP example that utilizes BTS 126 and BSC 2 to realize, with kneetop computer 148 exchange messages.By this way, utilizing this " break-make " when method is switched, only needing quite little or do not have information loss.
Claims (13)
1, a kind of internuncial method of multiple spot that is used to provide mobile node MN and at least two wireless communication service areas wherein provides communication channel between described at least two service areas, and described method comprises step:
Between described mobile node MN and service area network control unit, set up a plurality of communication channels via public RF link, first channel in described a plurality of channel is configured to be connected to described service area, and the second channel in described a plurality of channels is configured to be connected to described another service area via the communication channel that provides between described service area and another service area.
2, according to the method for claim 1, the wherein said step of setting up a plurality of communication channels realizes in network interface, wherein said network interface is associated the communication channel of each foundation with described mobile node MN, and indicates each described communication channel will be routed to which service area network control unit.
3. according to the process of claim 1 wherein that the described step of setting up a plurality of communication channels also comprises:
According to the standard of observing by the communication network that comprises these wireless service areas, between described service area network control unit and mobile node, set up a plurality of communication channels;
Generation is associated the channel of each foundation with described mobile node and described service area network control unit signaling information;
According to described signaling information, the communication channel of described foundation is routed to described another service area from described service area network control unit.
4, according to the method for claim 1, wherein insert a plurality of data serving nodes simultaneously by communication channel is routed to such network control unit from described service area network control unit, promptly described network control unit is coupled to the corresponding data service node in described another service area.
5, according to the method for claim 2, wherein said network interface is set up by mobile node.
6, according to the method for claim 2, wherein said network interface is set up by network control unit.
7, according to the method for claim 2, wherein said network interface is set up by data serving node.
8, according to the process of claim 1 wherein a described service area network control unit through one of correspondence among a plurality of data serving node PDSN and interface to data network,
Described method also comprises step:
The switching of the data network connection that provides via described service area network control unit is provided from the data network that provides via described another service area network control unit in execution, thereby between described transfer period, the communication channel of setting up in the network control unit of described another service area and inserting is routed to described service area network control unit by the network control unit from described another service area.
9, method according to Claim 8, wherein when described finishing switching, the communication channel of route is removed between the network control unit of described service area network control unit and described another service area, and described mobile node communicates with described service area network control unit via the communication channel of setting up and inserting between described transfer period.
10, method is according to Claim 8 wherein carried out described switching according to the standard of being observed by the communication network that comprises these wireless service areas.
11, method according to Claim 8, wherein said switching is started by described service area network control unit.
12, method according to Claim 8, wherein said switching is started by described mobile node.
13, method according to Claim 8, wherein said switching is started by the data serving node that is coupled to described service area network control unit.
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| US09/609,907 US6950657B1 (en) | 2000-07-03 | 2000-07-03 | Method for providing multiple points of connectivity to subscribers of wireless communication networks |
| US09/609,907 | 2000-07-03 |
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| CN1330476A CN1330476A (en) | 2002-01-09 |
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| US8442526B1 (en) | 2007-09-24 | 2013-05-14 | Sprint Spectrum L.P. | Method and system for registering a mobile node via a registration proxy |
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- 2001-01-15 EP EP01300290A patent/EP1170966B1/en not_active Expired - Lifetime
- 2001-05-10 CA CA002347063A patent/CA2347063C/en not_active Expired - Fee Related
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- 2001-07-03 CN CNB011175788A patent/CN1233140C/en not_active Expired - Fee Related
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- 2001-07-03 KR KR10-2001-0039485A patent/KR100414253B1/en active IP Right Grant
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| CA2347063C (en) | 2006-11-14 |
| CA2347063A1 (en) | 2002-01-03 |
| DE60100613T2 (en) | 2004-06-17 |
| JP2002084563A (en) | 2002-03-22 |
| US6950657B1 (en) | 2005-09-27 |
| JP4885375B2 (en) | 2012-02-29 |
| BR0102529A (en) | 2002-04-30 |
| KR100414253B1 (en) | 2004-01-07 |
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